Update fix_test_pr.yml

Author: MaksymukNatalia

.github/workflows/fix_test_pr.yml

@@ -54,7 +54,7 @@ jobs:
       run: docker ps
     - name: "Set backend tag"
       id: backend_tag
-      run: echo "backend_tag=docker container inspect $(docker container ls -aq) --format "{{.Config.Image}}" | grep -m 1 "victorycenterua/backend:" | cut -d "-" -f2 | head -c -1" >> $GITHUB_OUTPUT   
+      run: echo backend_tag=$(docker container inspect $(docker container ls -aq) --format "{{.Config.Image}}" | grep -m 1 "victorycenterua/backend:" | cut -d "-" -f2 | head -c -1) >> $GITHUB_OUTPUT   
     - name: "Set frontend tag"
       id: frontend_tag
       run: docker container inspect $(docker container ls -aq) --format "{{.Config.Image}}" | grep -m 1 "victorycenterua/client:" | cut -d "-" -f2 | head -c -1